sound/firewire/fireface/ff.c

   1 /*
   2  * ff.c - a part of driver for RME Fireface series
   3  *
   4  * Copyright (c) 2015-2017 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "ff.h"
  10
  11 #define OUI_RME 0x000a35
  12
  13 MODULE_DESCRIPTION("RME Fireface series Driver");
  14 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
  15 MODULE_LICENSE("GPL v2");
  16
  17 static void name_card(struct snd_ff *ff)
  18 {
  19         struct fw_device *fw_dev = fw_parent_device(ff->unit);
  20
  21         strcpy(ff->card->driver, "Fireface");
  22         strcpy(ff->card->shortname, ff->spec->name);
  23         strcpy(ff->card->mixername, ff->spec->name);
  24         snprintf(ff->card->longname, sizeof(ff->card->longname),
  25                  "RME %s, GUID %08x%08x at %s, S%d", ff->spec->name,
  26                  fw_dev->config_rom[3], fw_dev->config_rom[4],
  27                  dev_name(&ff->unit->device), 100 << fw_dev->max_speed);
  28 }
  29
  30 static void ff_free(struct snd_ff *ff)
  31 {
  32         snd_ff_stream_destroy_duplex(ff);
  33         snd_ff_transaction_unregister(ff);
  34
  35         fw_unit_put(ff->unit);
  36
  37         mutex_destroy(&ff->mutex);
  38         kfree(ff);
  39 }
  40
  41 static void ff_card_free(struct snd_card *card)
  42 {
  43         ff_free(card->private_data);
  44 }
  45
  46 static void do_registration(struct work_struct *work)
  47 {
  48         struct snd_ff *ff = container_of(work, struct snd_ff, dwork.work);
  49         int err;
  50
  51         if (ff->registered)
  52                 return;
  53
  54         err = snd_card_new(&ff->unit->device, -1, NULL, THIS_MODULE, 0,
  55                            &ff->card);
  56         if (err < 0)
  57                 return;
  58
  59         err = snd_ff_transaction_register(ff);
  60         if (err < 0)
  61                 goto error;
  62
  63         name_card(ff);
  64
  65         err = snd_ff_stream_init_duplex(ff);
  66         if (err < 0)
  67                 goto error;
  68
  69         snd_ff_proc_init(ff);
  70
  71         err = snd_ff_create_midi_devices(ff);
  72         if (err < 0)
  73                 goto error;
  74
  75         err = snd_ff_create_pcm_devices(ff);
  76         if (err < 0)
  77                 goto error;
  78
  79         err = snd_ff_create_hwdep_devices(ff);
  80         if (err < 0)
  81                 goto error;
  82
  83         err = snd_card_register(ff->card);
  84         if (err < 0)
  85                 goto error;
  86
  87         ff->card->private_free = ff_card_free;
  88         ff->card->private_data = ff;
  89         ff->registered = true;
  90
  91         return;
  92 error:
  93         snd_ff_transaction_unregister(ff);
  94         snd_ff_stream_destroy_duplex(ff);
  95         snd_card_free(ff->card);
  96         dev_info(&ff->unit->device,
  97                  "Sound card registration failed: %d\n", err);
  98 }
  99
 100 static int snd_ff_probe(struct fw_unit *unit,
 101                            const struct ieee1394_device_id *entry)
 102 {
 103         struct snd_ff *ff;
 104
 105         ff = kzalloc(sizeof(struct snd_ff), GFP_KERNEL);
 106         if (ff == NULL)
 107                 return -ENOMEM;
 108
 109         /* initialize myself */
 110         ff->unit = fw_unit_get(unit);
 111         dev_set_drvdata(&unit->device, ff);
 112
 113         mutex_init(&ff->mutex);
 114         spin_lock_init(&ff->lock);
 115         init_waitqueue_head(&ff->hwdep_wait);
 116
 117         ff->spec = (const struct snd_ff_spec *)entry->driver_data;
 118
 119         /* Register this sound card later. */
 120         INIT_DEFERRABLE_WORK(&ff->dwork, do_registration);
 121         snd_fw_schedule_registration(unit, &ff->dwork);
 122
 123         return 0;
 124 }
 125
 126 static void snd_ff_update(struct fw_unit *unit)
 127 {
 128         struct snd_ff *ff = dev_get_drvdata(&unit->device);
 129
 130         /* Postpone a workqueue for deferred registration. */
 131         if (!ff->registered)
 132                 snd_fw_schedule_registration(unit, &ff->dwork);
 133
 134         snd_ff_transaction_reregister(ff);
 135
 136         if (ff->registered)
 137                 snd_ff_stream_update_duplex(ff);
 138 }
 139
 140 static void snd_ff_remove(struct fw_unit *unit)
 141 {
 142         struct snd_ff *ff = dev_get_drvdata(&unit->device);
 143
 144         /*
 145          * Confirm to stop the work for registration before the sound card is
 146          * going to be released. The work is not scheduled again because bus
 147          * reset handler is not called anymore.
 148          */
 149         cancel_work_sync(&ff->dwork.work);
 150
 151         if (ff->registered) {
 152                 /* No need to wait for releasing card object in this context. */
 153                 snd_card_free_when_closed(ff->card);
 154         } else {
 155                 /* Don't forget this case. */
 156                 ff_free(ff);
 157         }
 158 }
 159
 160 static const struct snd_ff_spec spec_ff400 = {
 161         .name = "Fireface400",
 162         .pcm_capture_channels = {18, 14, 10},
 163         .pcm_playback_channels = {18, 14, 10},
 164         .midi_in_ports = 2,
 165         .midi_out_ports = 2,
 166         .protocol = &snd_ff_protocol_ff400,
 167 };
 168
 169 static const struct ieee1394_device_id snd_ff_id_table[] = {
 170         /* Fireface 400 */
 171         {
 172                 .match_flags    = IEEE1394_MATCH_VENDOR_ID |
 173                                   IEEE1394_MATCH_SPECIFIER_ID |
 174                                   IEEE1394_MATCH_VERSION |
 175                                   IEEE1394_MATCH_MODEL_ID,
 176                 .vendor_id      = OUI_RME,
 177                 .specifier_id   = 0x000a35,
 178                 .version        = 0x000002,
 179                 .model_id       = 0x101800,
 180                 .driver_data    = (kernel_ulong_t)&spec_ff400,
 181         },
 182         {}
 183 };
 184 MODULE_DEVICE_TABLE(ieee1394, snd_ff_id_table);
 185
 186 static struct fw_driver ff_driver = {
 187         .driver = {
 188                 .owner  = THIS_MODULE,
 189                 .name   = "snd-fireface",
 190                 .bus    = &fw_bus_type,
 191         },
 192         .probe    = snd_ff_probe,
 193         .update   = snd_ff_update,
 194         .remove   = snd_ff_remove,
 195         .id_table = snd_ff_id_table,
 196 };
 197
 198 static int __init snd_ff_init(void)
 199 {
 200         return driver_register(&ff_driver.driver);
 201 }
 202
 203 static void __exit snd_ff_exit(void)
 204 {
 205         driver_unregister(&ff_driver.driver);
 206 }
 207
 208 module_init(snd_ff_init);
 209 module_exit(snd_ff_exit);